env GOPRIVATE=test/main

garble build
exec ./main
cmp stderr main.stderr

! binsubstr main$exe 'garbledFunc' 'GarbledFunc'

[short] stop # no need to verify this with -short

go build
exec ./main
cmp stderr main.stderr

-- go.mod --
module test/main

go 1.15
-- main.go --
package main

import (
	_ "os/exec"
	_ "strings"
	_ "unsafe"

	_ "test/main/imported"
)

// A linkname to an external non-garbled func.
//go:linkname byteIndex strings.IndexByte
func byteIndex(s string, c byte) int

// A linkname to an external non-garbled non-exported func.
//go:linkname interfaceEqual os/exec.interfaceEqual
func interfaceEqual(a, b interface{}) bool

// A linkname to an external garbled func.
//go:linkname garbledFunc test/main/imported.GarbledFuncImpl
func garbledFunc() string

// A linkname to an entirely made up name, implemented elsewhere.
//go:linkname renamedFunc madeup.newName
func renamedFunc() string

func main() {
	println(byteIndex("01234", '3'))
	println(interfaceEqual("Sephiroth", 7))
	println(garbledFunc())
	println(renamedFunc())
}
-- imported/imported.go --
package imported

import (
	_ "unsafe"
)

func GarbledFuncImpl() string {
	return "garbled func"
}

//go:linkname renamedFunc madeup.newName
func renamedFunc() string {
	return "renamed func"
}
-- main.stderr --
3
false
garbled func
renamed func